This is an example of how to use XCTContext.runActivity method in page object patter for XCUITest. This allows to get nice reports with Allure in the future.

dummyXCUITest.swift

class LoginPage {
    func login(with userName: String, and password: String): SomeOtherPage {
        return XCTContext.runActivity("Login as existing user") {
            this.enter(userName: userName)
            this.enter(password: password)
            this.submit()
            return new SomeOtherPage(app: this.app);
        }
    }

    func enter(userName: String): LoginPage {
        return XCTContext.runActivity("Enter '\(userName)' user name) {
            this.userNameField.sendKeys(userName)
            return this;
        })
    }

    func enter(password: String): LoginPage {
        return XCTContext.runActivity("Enter '\(password)' password) {
            this.passwordField.sendKeys(password)
            return this;
        })
    }

    func submit() {
        XCTContext.runActivity("Tap 'Submit' button") {
            this.submitButton.tap()
        })
    }
}

class LoginTest {

    func testSuccesfullLogin() {
        let user = XCTContext.runActivity("Given a new user", {
            return UserGenerator.generate(.newUser)
        })

        let someOtherPage = XCTContext.runActivity("When i enter valid credentials and submit them", {
            return new LoginPage().login(with: user.userName, and: user.password)
        })

        XCTContext.runActivity("I expect to be logged in and see 'SomeOtherPage' ", {
           XCTAssertTrue(someOtherPage.title.exists)     
        })
    }
}